器件名称:
CD54HCT574
功能描述:
High-Speed CMOS Logic Octal D-Type Flip-Flop, 3-State Positive-Edge Triggered
文件大小:
454.51KB 共18页
简 介:
CD54/74HC374, CD54/74HCT374, CD54/74HC574, CD54/74HCT574 Data sheet acquired from Harris Semiconductor SCHS183C February 1998 - Revised May 2004 High-Speed CMOS Logic Octal D-Type Flip-Flop, 3-State Positive-Edge Triggered Description The ’HC374, ’HCT374, ’HC574, and ’HCT574 are octal D-type flip-flops with 3-state outputs and the capability to drive 15 LSTTL loads. The eight edge-triggered flip-flops enter data into their registers on the LOW to HIGH transition of clock (CP). The output enable (OE) controls the 3-state outputs and is independent of the register operation. When OE is HIGH, the outputs are in the high-impedance state. The 374 and 574 are identical in function and differ only in their pinout arrangements. Features Buffered Inputs [ /Title (CD74 HC374 , CD74 HCT37 4, CD74 HC574 , CD74 HCT57 Common Three-State Output Enable Control Three-State Outputs Bus Line Driving Capability Typical Propagation Delay (Clock to Q) = 15ns at VCC = 5V, CL = 15pF, TA = 25oC Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads Wide Operating Temperature Range . . . -55oC to 125oC Balanced Propagation Delay and Transition Times Signicant Power Reduction Compared to LSTTL Logic ICs HC Types - 2-V to 6-V Operation - High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V HCT Types - 4.5-V to 5.5-V Operation - Direct LSTTL Input Logic Compatibility, VIL= 0.8V (……
